Early time evolution of negative ion clouds and electron density depletions produced during electron attachment chemical release experiments

AbstractThe propagation characteristics of solitary wave in a degenerate plasma in the presence of Landau-quantised magnetic field and heavy negative ion are studied. The nature of solitary wave in such plasma under the influence of magnetic quantisation and the concentration of both electrons and negative ions, as well as in the presence of degenerate temperature, are studied with the help of a time-independent analytical scheme of the solution of Zakharov–Kuznetsov equation. The electron density, as well as the magnetic quantisation parameter, has an outstanding effect on the features of solitary wave proliferation in such plasma. Interestingly, for any fixed electron density, the magnetic quantisation parameter has an equal control on the maximum height and dispersive properties of the solitary wave. Toward higher temperatures and higher magnetic fields, the width of the solitary wave decreases. For a lower magnetic field, the maximum amplitude of the solitary wave decreases rapidly at higher values of degenerate temperature and negative ion concentration; however, at a lower value of degenerate temperature, the maximum amplitude increases with increasing negative ion concentration.

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Early Time Evolution of Selective Oxidation in a CMnSi AHSS

Metallurgical and Materials Transactions A ◽

10.1007/s11661-018-5078-1 ◽

2019 ◽

Vol 50 (3) ◽

pp. 1358-1369

Author(s):

Mary E. Story ◽

Bryan A. Webler

Keyword(s):

Time Evolution ◽

Selective Oxidation ◽

Early Time

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Electron attachment and compound formation in flames. VI. Negative ion and compound formation in flames containing rhenium and potassium

The Journal of Chemical Physics ◽

10.1063/1.430466 ◽

1975 ◽

Vol 62 (2) ◽

pp. 644 ◽

Cited By ~ 22

Author(s):

Robert K. Gould

Keyword(s):

Electron Attachment ◽

Negative Ion ◽

Compound Formation

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Dissociative Electron Attachment Processes in SO2 and NO2

Canadian Journal of Chemistry ◽

10.1139/v71-255 ◽

1971 ◽

Vol 49 (9) ◽

pp. 1571-1574 ◽

Cited By ~ 12

Author(s):

D. A. Rallis ◽

J. M. Goodings

Keyword(s):

Kinetic Energy ◽

Ground State ◽

Electronic Excitation ◽

Electron Attachment ◽

Negative Ion ◽

Dissociation Limit ◽

Dissociative Electron Attachment ◽

Zero Kinetic Energy ◽

Trapped Electron ◽

Second Peak

A trapped electron apparatus has been used to identify the processes involved in negative ion formation for the triatomic oxides SO2 and NO2. Two O− peaks are observed in SO2 with onset values at 4.2 ± 0.15 and 6.3 ± 0.2 eV, and peak values at 5.0 ± 0.15 and 7.4 ± 0.15 eV, respectively. From kinetic energy analysis of the O− ions, both peaks are found to have the same dissociation limit involving SO in its ground state. For NO2, two dissociative electron attachment peaks are observed with onset values at 1.6 ± 0.2 and 7.3 ± 0.3 eV, and peak values at 3.0 ± 0.2 and 8.1 ± 0.2 eV, respectively. The first broad peak is explained by overlapping contributions from two processes having the same dissociation limit involving ground state NO; they differ only in the amount of kinetic energy possessed by the fragments. The second peak appears to involve electronic excitation of the neutral fragment NO* with zero kinetic energy at onset.

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